I love Scepter, but could use some advice.
You never mentioned PvE or PvP build. Below are the highest DPS builds using a scepter. I say power will be your best bet.
For PvE: http://metabattle.com/wiki/Build:Elementalist_-_S/F_LH
For PvP: http://metabattle.com/wiki/Build:Elementalist_-_S/F_Fresh_Air
Scepter is used mainly to blast fire fields for Fury and Might. Or Fresh Air builds. Both take a lot of practice and skill to master. The lightning hammer is easier to use and I would recommend it for beginners.
I use a PvE Fresh Air build because I’m weird. http://gw2skills.net/editor/?vFAQJArYnMICNNgVPAmNAsSgBBAjeCbhMZEAKAHA5SeBqhA
Its a lot like the S/D LH build. But instead of LH during that rotation I start bursting with lightning strikes until Fire is off cool down and then repeat. All zerkers, all the time.
Dragon Tooth and Fire Grab are your two biggest DPS skills. Sadly, Arc Lightning is your strongest AA. So you should stay in Fire and Air most of the time if you want anything to die. Use Water for heals or using a conjure. Search the youtubes, they have very good guides on using these builds. Good Luck and Happy Hunting!